Finding the Third Proportional to 90.06 and 136.38

Step by Step Solution

1. Step 1: Write the proportion equation
   90.06 : 136.38 = 136.38 : x
2. Step 2: Convert to fraction form
   90.06/136.38 = 136.38/x
3. Step 3: Cross multiply
   90.06x = 136.38 × 136.38
4. Step 4: Simplify right side
   90.06x = 18,598.14
5. Step 5: Solve for x
   x = 18,598.14/90.06
6. Step 6: Final answer
   x = 206.50